Examine source code of Down Home

{
  "name": "Down Home",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "1.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(240, 237, 237, 1)",
      "toolbar": "rgba(0, 0, 0, 0.01)",
      "bookmark_text": "rgba(235, 232, 232, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.12)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c611c5b1-68e9-4835-aefe-2f030e11c729}"
    }
  }
}